大规格轴承钢棒材连轧工艺有限元模拟与分析

Numerical simulation and analysis of continuous rolling of large size bearing steel bar

结合现场轧制工艺条件,采用大型非线性有限元软件对大规格轴承钢棒材连轧工艺进行数值模拟,主要分析大规格轴承钢棒材在热连轧过程中各道次等效应变场和轧制力分布情况。结果表明,大规格轴承钢棒材在各道次轧制过程中的变形区域主要集中在轧件的表层,芯部等效应变较小;各道次之间轧制力急剧变化不利于轧制工艺的改善,同时也会对轧制设备提出更高的要求;各道次轧制力分布不均匀主要是由现场轧制工艺规程中各道次轧件压下量分配不当造成的。

In the light of rolling process conditions ,continuous rolling process of large size bearing steel bar was numerically simulated by the advanced nonlinear finite element analysis software .The e‐quivalent strain and rolling force distribution of the steel bar in all passes of hot continuous rolling were analyzed .Results show that the deformation regions of the steel bar at all rolling passes is main‐ly located on the surface of the rolled piece ,and the equivalent strain in the core of the rolled bar is smaller .Dramatic changes of rolling force between each pass are unfavorable to the improvement of rolling process ,and this results in the higher demand for the performance of rolling equipment .The uneven distribution of rolling forces in all passes is caused by the misallocation of the rolling reduction in all passes during the actual rolling process .